218998853 has 2 divisors, whose sum is σ = 218998854. Its totient is φ = 218998852.

The previous prime is 218998841. The next prime is 218998867. The reversal of 218998853 is 358899812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208455844 + 10543009 = 14438^2 + 3247^2 .

It is a cyclic number.

It is not a de Polignac number, because 218998853 - 2⁶ = 218998789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218998795 and 218998804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218997853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109499426 + 109499427.

It is an arithmetic number, because the mean of its divisors is an integer number (109499427).

Almost surely, 2^218998853 is an apocalyptic number.

It is an amenable number.

218998853 is a deficient number, since it is larger than the sum of its proper divisors (1).

218998853 is an equidigital number, since it uses as much as digits as its factorization.

218998853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 53.

The square root of 218998853 is about 14798.6098333593. The cubic root of 218998853 is about 602.7639636973.

The spelling of 218998853 in words is "two hundred eighteen million, nine hundred ninety-eight thousand, eight hundred fifty-three".